Vista is closer to Apple OS X which I also like. It has a polished feel that Windows XP lacks. I am running Vista 64 and I do feel it has better security then Windows XP.
Vista all the way for me. I have been using vista for about 5 months before the vista came out. And never had any bug or crashes. Sure a couple softwares wont work, but thats not Vista's fault.
Once I figure out all the goofy little things that are driving me nuts, I will probably like Vista fine.